Remove database name “omniwallet” from schema

Update db-init.sh to specify the  “omniwallet” name correctly.
Remove hard-coded settings, defer to env. vars

PGUSER
PGPASSWORD
PGHOST
PGPORT

Other minor syntax simplifications
Add a README.md file to the db scripts directory
Fix some key issues, defer others by commenting out.
default missing addresses to 0 value for consensus checker
additional consensus checker logic
Merge pull request #15 from msgilligan/msgilligan-issue-14

Remove database name “omniwallet” from schema
additional consensus checker logic
additional consensus checker logic
Merge branch 'master' of https://github.com/mastercoin-MSC/omniEngine
Expire Blocks needs to include current block
Merge branch 'master' into msgilligan-jenkins

Conflicts:
	database/scripts/db-init.sh
Merge pull request #18 from msgilligan/msgilligan-jenkins

Fix issues in schema, clean up shell scripts a little